VMODEL
STEPS
IN MAKING A MODEL
STEPS IN MAKING A MODEL
Target
Plan
Describe
Build
CHECK
Checking your model
When it is time to check your model, the professor will look at your target statement and the model you created. The professor will check to see if your model explains the target of the model.
You can tell if the professor is happy with your model if you look at his face on your screen.
If your model explains your model target, the professor smiles.
If your model could explain your model target, but some things are unclear, the professor looks confused.
If your model doesn't explain your model target at all, the professor looks angry.
How does the professor know if your model explains the target?
The professor looks at the thing that you say is changing and sees if it is changing, and then checks to see if it is changing in the right way.
Here is an example. If the professor looks at this model and problem statement, what would he say?
Target
"The level of water in the bathtub is decreasing."
Is the level of water in the bathtub decreasing?The professor starts by looking at the processes in the model. This model only has one process, filling, and it increases the amount of water. Since the model says that amount of water influences level of water, the professor knows that the level of water is increasing if the amount of water is increasing.
So level of water is changing, but it is going in the opposite direction from what the target says. It is increasing, not decreasing. This model does not explain the model target.
The professor might then suggest that the model needs another process that decreases the water, or maybe that the influences link isn't right. Which is it? If you go back to the model plan, and look at the processes listed there, is there another that might help?
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ON to using the library
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